Wrench.



W. A. JACKSON.

WRENCH.

APPLICATION FILED JAN. 20. 19:5.

Patqmted Apra13, 1915;.

mifucssrs THE NORRIS PETERS c0. PHOTOYLITHQ, WASHINGTON, 0. c.

WILLIAM A. JACKSON, U3? AIJEOGNA, PENNEYLVANIA.

WRENCH.

Application filed January 24), 1915.

To all whom it may concern Be 1t known that 1, WILLIAM A. JACKSON, a citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Wrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to tools, and more especially to wrenches wherein the movable jaw has a grip on the shank; and the object of the same is to effect certain improvements over my prior U. S. Patent Number 773,259 to the end that the same may be simplified and cheapened in construction and rendered stronger.

This and other objects are carried out by the present wrench which is made as set forth in the following specification and claim, and shown in the drawings wherein Figure 1 is a perspective view of this wrench with its jaws shaped to receive a pipe, and its movable jaw slightly broken away; and Fig. 2 is a side elevation of the wrench, indicating the position of the thumb and forefinger in connection with the movable aw.

lln the drawings the numeral 1 designates a jaw which is fixed to the outer end of a shank 2, the latter being by preference rectangular in cross section as indicated in the drawings and provided in its front edge with a groove 8 extending from a point near the jaw l nearly to the inner end of the handle. The extremity of the latter is reduced and threaded as at 4, and receives a handle 5 as of wood or the like, and the same can be un screwed when desired. However I do not wish to be limited to this precise form of handle, nor the means for detachably connecting it with the reduced end of the shank.

llhe movable aw is designated as a whole by the reference numeral 11, and in the drawings the faces of both jaws are dished and possibly serrated as at 6 and 16 so that this wrench may be applied to a pipe. However,'it is quite possible that the jaws may have flat meeting faces for application to other members, as well understood in this art.

Fig. 2 of the drawings gives a complete Specification of Letters facent.

Patented Apr. 113, 1915.,

Serial No. 3,320.

side elevation of the movable jaw in its preferred form. Its body overlies the edge of b c shank 2, and at the ends of said body it has two loops l2 and 1.8 which loosely inclose said shank so that this jaw may be moved thereon as desired, the loop 13 being spaced from the loop 12 in order that the forefinger F of the operators hand may engage beneath it. The upper rear end of the body where it joins the loop 13 is rounded as at 1-1, so that the ball of the thumb T may engage the same as will be described below. Formed in the body 11 is a chamber 15 in which is located a rock lever 20 whose upper arm projects above the jaw and is rounded or otherwise formed into a thumb piece 21 as indicated, and the lower end of this rock lever is rounded as indicated at 22 and formed slightly eccentric to a cross pin 28 through the mid-length of the lever and the sides of the body 11, and by which the lever is pivoted within the chamber 15. A spring 25 is interposed between the upper arm 20 of the lever and the upstanding portion 29 of the jaw 11, which portion carries the face 16 whatever the construction of the latter.

The parts are assembled by removing the handle 5 and slipping the two loops 12 and 13 over the reduced end 4; of the shank 2, and along the rectangular portion of the latter until the rounded end 22 of the rock lever drops into the groove 3. The pin 23 may then be passed through the sides of the jaw-body 11 and a hole which is properly formed at the mid-length of the lever; and the pin might in fact be a bolt, or if it were a rivet the rock lever would be permanently connected with the movable jaw. Finally the spring 25 is slipped into place as shown in Fig. 1, and the wrench is ready for use as soon as the handle is applied. The operator grasps the handle within his hand as indicated in dotted lines in Fig. 2, and places the ball of his thumb against the rounded upper portion of the rear loop 13 with the tip of the thumb against the thumb piece 21 of the rock lever. Bearing forward with his thumb, its tip turns the lever on its pivot pin so that its rounded lower end 22 is lifted off the bottom of the channel or groove 3, and the ball of the thumb pushes the entire movable jaw forward until its face 16 compacts with the object being gripped be tween said face and the face 6 of the jaw 1. When he then releases pressure on the thumb of the movable jaw, to move to the rear toward the handle 5 will be'firmly resisted, and

. will be resisted more firmly the greater the tendency. Hence any object clamped between the two jaws will be held very tightly, no matter which way the wrench is turned. To disengage the wrench from this object, the forefinger is placed under the rear loop 13 and the tip of the thumb borne against the thumb piece 21. This tilts the rock lever on its pivot, after which entire movable jaw is drawn to the rear, and the object is released.

7 hat is claimed i In a wrench, the combination with a shank of rectangular cross section longitudinally grooved in its upper edge and reduced at its inner end, and a fixed jaw carried by the outer end of the shank;

of a movable jaw having two loops slidably engaging said shank and spaced from each other and a body connecting the upper ends of said loops and rounded where it merges into the rear loop, the body also having a chamber and its forward upstanding portion constituting the movable jawface, a pin extending through the body and across its chamber, a rock-lever mounted at mid-length on said pin with its lower end rounded and eccentric to the pin and adapted to rest in the bottom of said groove and its upper end projecting above the j awbody and carrying a thumb piece, and an expansive spring between said upper end and the upstanding portion of this jaw, the whole for use substantially as described.

In testimony whereof I aiiiX my signature in. presence of two witnesses.

WILLIAM A. JACKSON.

Witnesses GEORGE E. ONNES, A. J. FILLER.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

